Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products
The specific surface area (SSA) of snow determines in part the albedo of snow surfaces and the capacity of the snow to adsorb chemical species and catalyze reactions. Despite these crucial roles, almost no value of snow SSA are available for the largest permanent snow expanse on Earth, the Antarctic...
Published in: | The Cryosphere |
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Copernicus Publications
2011
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Online Access: | https://doi.org/10.5194/tc-5-631-2011 http://www.the-cryosphere.net/5/631/2011/tc-5-631-2011.pdf https://doaj.org/article/d2bdf92bda034e4cbd210bd8e1bd288b |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:d2bdf92bda034e4cbd210bd8e1bd288b 2023-05-15T13:43:15+02:00 Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products J.-C. Gallet F. Domine L. Arnaud G. Picard J. Savarino 2011-08-01 https://doi.org/10.5194/tc-5-631-2011 http://www.the-cryosphere.net/5/631/2011/tc-5-631-2011.pdf https://doaj.org/article/d2bdf92bda034e4cbd210bd8e1bd288b en eng Copernicus Publications doi:10.5194/tc-5-631-2011 1994-0416 1994-0424 http://www.the-cryosphere.net/5/631/2011/tc-5-631-2011.pdf https://doaj.org/article/d2bdf92bda034e4cbd210bd8e1bd288b undefined The Cryosphere, Vol 5, Iss 3, Pp 631-649 (2011) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2011 fttriple https://doi.org/10.5194/tc-5-631-2011 2023-01-22T19:11:46Z The specific surface area (SSA) of snow determines in part the albedo of snow surfaces and the capacity of the snow to adsorb chemical species and catalyze reactions. Despite these crucial roles, almost no value of snow SSA are available for the largest permanent snow expanse on Earth, the Antarctic. We report the first extensive study of vertical profiles of snow SSA near Dome C (DC: 75°06' S, 123°20' E, 3233 m a.s.l.) on the Antarctic plateau, and at seven sites during the logistical traverse between Dome C and the French coastal base Dumont D'Urville (DDU: 66°40' S, 140°01' E) during the Austral summer 2008–2009. We used the DUFISSS system, which measures the IR reflectance of snow at 1310 nm with an integrating sphere. At DC, the mean SSA of the snow in the top 1 cm is 38 m2 kg−1, decreasing monotonically to 14 m2 kg−1 at a depth of 50 cm. Along the traverse, the snow SSA profile is similar to that at DC in the first 600 km from DC. Closer to DDU, the SSA of the top 5 cm is 23 m2 kg−1, decreasing to 19 m2 kg−1 at 50 cm depth. This difference is attributed to wind, which causes a rapid decrease of surface snow SSA, but forms hard windpacks whose SSA decrease more slowly with time. Since light-absorbing impurities are not concentrated enough to affect albedo, the vertical profiles of SSA and density were used to calculate the spectral albedo of the snow for several realistic illumination conditions, using the DISORT radiative transfer model. A preliminary comparison with MODIS data is presented and our calculations and MODIS data show similar trends. Article in Journal/Newspaper Antarc* Antarctic Antarctica The Cryosphere Unknown Antarctic Austral Base Dumont-d'Urville ENVELOPE(141.000,141.000,-66.000,-66.000) Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) The Antarctic The Cryosphere 5 3 631 649 |
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Open Polar |
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language |
English |
topic |
geo envir |
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geo envir J.-C. Gallet F. Domine L. Arnaud G. Picard J. Savarino Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products |
topic_facet |
geo envir |
description |
The specific surface area (SSA) of snow determines in part the albedo of snow surfaces and the capacity of the snow to adsorb chemical species and catalyze reactions. Despite these crucial roles, almost no value of snow SSA are available for the largest permanent snow expanse on Earth, the Antarctic. We report the first extensive study of vertical profiles of snow SSA near Dome C (DC: 75°06' S, 123°20' E, 3233 m a.s.l.) on the Antarctic plateau, and at seven sites during the logistical traverse between Dome C and the French coastal base Dumont D'Urville (DDU: 66°40' S, 140°01' E) during the Austral summer 2008–2009. We used the DUFISSS system, which measures the IR reflectance of snow at 1310 nm with an integrating sphere. At DC, the mean SSA of the snow in the top 1 cm is 38 m2 kg−1, decreasing monotonically to 14 m2 kg−1 at a depth of 50 cm. Along the traverse, the snow SSA profile is similar to that at DC in the first 600 km from DC. Closer to DDU, the SSA of the top 5 cm is 23 m2 kg−1, decreasing to 19 m2 kg−1 at 50 cm depth. This difference is attributed to wind, which causes a rapid decrease of surface snow SSA, but forms hard windpacks whose SSA decrease more slowly with time. Since light-absorbing impurities are not concentrated enough to affect albedo, the vertical profiles of SSA and density were used to calculate the spectral albedo of the snow for several realistic illumination conditions, using the DISORT radiative transfer model. A preliminary comparison with MODIS data is presented and our calculations and MODIS data show similar trends. |
format |
Article in Journal/Newspaper |
author |
J.-C. Gallet F. Domine L. Arnaud G. Picard J. Savarino |
author_facet |
J.-C. Gallet F. Domine L. Arnaud G. Picard J. Savarino |
author_sort |
J.-C. Gallet |
title |
Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products |
title_short |
Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products |
title_full |
Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products |
title_fullStr |
Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products |
title_full_unstemmed |
Vertical profile of the specific surface area and density of the snow at Dome C and on a transect to Dumont D'Urville, Antarctica – albedo calculations and comparison to remote sensing products |
title_sort |
vertical profile of the specific surface area and density of the snow at dome c and on a transect to dumont d'urville, antarctica – albedo calculations and comparison to remote sensing products |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/tc-5-631-2011 http://www.the-cryosphere.net/5/631/2011/tc-5-631-2011.pdf https://doaj.org/article/d2bdf92bda034e4cbd210bd8e1bd288b |
long_lat |
ENVELOPE(141.000,141.000,-66.000,-66.000) ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) |
geographic |
Antarctic Austral Base Dumont-d'Urville Dumont d'Urville Dumont-d'Urville The Antarctic |
geographic_facet |
Antarctic Austral Base Dumont-d'Urville Dumont d'Urville Dumont-d'Urville The Antarctic |
genre |
Antarc* Antarctic Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica The Cryosphere |
op_source |
The Cryosphere, Vol 5, Iss 3, Pp 631-649 (2011) |
op_relation |
doi:10.5194/tc-5-631-2011 1994-0416 1994-0424 http://www.the-cryosphere.net/5/631/2011/tc-5-631-2011.pdf https://doaj.org/article/d2bdf92bda034e4cbd210bd8e1bd288b |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-5-631-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
container_issue |
3 |
container_start_page |
631 |
op_container_end_page |
649 |
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